Filter-valve.



G. HUNGERFORD. V

FILTER VALVE.

APPLICATION FILED MAY 26, 1906. 1 902,232. Patented Oct. 27, 1908.

J J7 f A if m: P 17 I L I 2 Z0 1 4 76 7 3 mm m for Churchill fimgeflord Q/vi b1 eases mwwgg UNITED STATES PATENT OFFICE.

CHURCHILL HUNGERFORD, OF PHILADELPHIA, PENNSYLVANIA.

FILTER-VALVE vented a new and useful Filter-Valve, of

which the following is a specification.

The principal objects are to provide a simple and efficient filter-valve whereof the ports will be automatically increased in area uring the passage of water therethrough in one direction during the cleaning of the filter and automatically decreased in area upon the reversal of flow for filtering purposes; and to construct the boundaries of the ports in such manner that they in response to wa' ter pressure will exert a grinding or vibratory act1on upon caught matter and thereby free the ports.

With these and other objects in view the invention consists in the matters hereinafter described and claimed.

'The nature, characteristic features and scope of the invention will be more clearly understood from the following description taken in connection with the accompanying drawing, forming a part hereof, wherein Figure 1, is a vertical section of a portion of a filter provided with valves embodying my invention. Fig. 2, is a bottom view, partly broken away, of one of the valves. Fig. 3, is a sectional view of the valve; and Fig. 4, is a detail sectional view with the parts separated and in perspective.

1, designates the lower portion of a filter tank which is divided into two compartments 2 and 3, by a partition 4, the upper compartment containing the sand or other filtering medium, and the lower compartment serving as a receptacle for the filtered water.

5, indicates the valves, and in practice the partition 4, is equipped with one or more of them. The casing of the valve is of angular cross-section and embodies substantially resilient top and bottom plates and an intermediate frame forming with said plates, ports,

whereof the area is dependent on the pressure.

6, and 7, designate, respectively, the top and bottom plates of the valve, and they are separated by the blocks or corner pieces 8. The blocks or separating pieces 8, are served at right angles with slots 9, in which the side members 1.0, are anchored. The top and bottom plates are generally constructed of Specification of Letters Patent.

Application'fllcd May 26, 1906.

Patented Oct. 27, 1908.

Serial No. 318,899.

thin strips of the same material. The edges of the strips 10, are flush with those of the blocks or separating devices 8, and by inserting distance pieces 11, long narrow slots 12, are formed intermediate the top, bottom and sides, said slots constituting ports for the passage of water. The detachable securing means or bolts 13, enable the plates to be separated for the insertion or removal of distance pieces for regulating the normal area of the ports. The lower plate 7, is served with a flanged opening 14, which is threaded for the reception of a short pipe 15, which penetrates the partition 4, and thus estabishes communication between the two compartments of the filter.

During the filtering operation the water to be filtered passes down through the sand into the valve or valves through the ports 12, and thence into the compartment 3, from which it may be drawn off through the opening 16. During the washing operation the flow of water is reversed,-that is to say, the water passes up through the compartments 3 and 2, to agitate the sand and carry off the foreign substances deposited therein during the filtering operation. A wide range of automatic variation in area of the ports 12, during the filtering and cleaning operations is accomplished by my improved valve. During the cleaning 0 eration there is obviously ressure in the va ve due to the fact that the inlet passage is larger than the narrow slits or ports 12. This causes the walls of the valve to bow outwardly whereby the area of the ports is increased and this enables any caught or trapped matter to escape. The plates whose edges bound the ports may not move equally in response to ressure, or they may be relatively more or lbss resilient so that under pressure there is vibratory rela tive movement between them.- This vibratory movement of the walls tends to free the orts of any deposits of sand or dirt that may have accumulated therein.

It will be observed that the top plate overhangs or projects beyond the side walls of the valve and this overhang or rojection 17, is useful in that it holds the ffitering material away from the ports and thus prevents fouling of the latter.

It will be ovious to those skilled in the art to which the invention relates that various valve may be rigid, and the sidewalls may be alternately flexible and rigid.

Having described the nature and objects of the invention, What I claim as new and desire to secure by Letters Patent is:

1. A valve of the character stated consisting of top and bottom plates and an intermediate frame forming ports, said frame responding to pressure to vary the area of the ports.

2. A valve of the character stated consisting of top and bottom plates and an intermediate resilient frame forming ports whereof the area is variable with the pressure.

3. A valve of the character stated having ports whereof the area is variable with the pressure and having a frame and top and bottom plates of which the former plate overhangs the ports.

4. A- va p'orts bounded by the edges of resilient plates and a resilient frame which respond to pressure and vibrate at their edges and produce a grinding action.

In testimony whereof I have hereunto 25 signed my name in the presence of Witnesses.

CHURCHILL HUNGERFORD. Witnesses:

K. M. RICHMOND. Ms A. RICHMOND.

ve of the type described having 20 

